William mcausland



(No Model;) 4 2 sheets-sneet 1.

W. MGAUSLAND.

MBTALLIG SPUN ARTIOLE.

No. 599,286. Patented Feb. 15,1898.`

(Na Model.) 2 sneet-sheet 2.

W. MGAUSLAND. MBTALLIG SPUN ARTIGLE.

NO. 599,286. Patented Feb. 15, 1898.

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blocking the struck-up cylinder.

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VVILLIABII MCAUSLAND, OF TAUNTON, MASSACHUSETTS, ASSIGNOR TO THE REEDdl: BARTON CORPORATION, OF SAME PLAOE.

Wi ETALLIC SPUN ARTHCLE.

SPECIFICATION forming part of Letters Patent 1\To. 599,286, datedFebruary 15, 1898. Application filed J'uly 1,1895. Serial Na. 554,530.(No model.)

T all witam it may concrn:

Be it known that LWILLIAM McAUsLAND, a citizen of the United States,residing at Taunton, in the county of Bristol and Oommonwealth ofMassachusetts, have invented certain new and useful Improvements inMetallic Spun Articles, of which the following is a specification.

In the accompanying drawings, Figure l is an elevation, and Fig. 2 aVertical section, of an article embodying my invention. Fig. 3 shows insection the preliminary operation of Fig. 4: is a sectional view showingthe prepared blank spun to the form of the solid chuck. Fig. 5 is asectional view showing the article spun to form the bulge and with 'thewalls of the article of uniform thickness on a sectional chuck; and Fig.6 is a section of the same Character of chuck, showing the finalspinning operation.

In hollow-spun metallic articles for household use-such as sugar-bowls,tea sets, and the like-great trouble and annoyance have arisen from thefact that the article very soon becomes marred and dented. This isespecially the case where the article is made of some soft metal, suchas britannia, the exposed projecting portions becoming very quicklydented unless great care is taken. To avoid this difiiculty, I haveinvented an improved article of which the prominentlyexposed portions ofthe walls between the base and lip are thickened by means of a specialprocess in spinning heretofore unused, and for which I have madeapplication for Letters Patent of the United States, filed July 1,1895,Serial No. 554,529.

In the drawings I have shown a receptacle suitable for sugar or otheruses, and the section Fig. 2 shows the protruding` portion A of the wallconsiderably thicker than any other part of the walls. This portion A ofthe article is the part particularly exposed to blows and most liable tobecome dented. By thickening the wall at this point I have found thatgreat additional strength is given it 5 in fact, much more so than ifthe thickness of the whole article were uniformly increased, which wouldalso add greatly to the weight. Thus by thickening the wall at A, I canproduce a strong light comparatively cheap article which it is almostimpossible to dent by any ordinary use to which it might be subjected.

The method of producing the article is illustrated in Figs. 3, 4:, 5,and 6. The first operation is to block or strike up from a fiat disk ofmetal the cylindrical shell A', Fig. '3. The Shell A' is next placed onthe solid chuck B, as shown in Fig. 3, and spun so that its outlineconforms to the form of the chuck B, as shown in Fig. 4. In thisspinning the metal is worked, as shown by the arrows, from X to Y, orfrom the bottom upward. The shell Al is next placed on the sectionalchuck O, Fig. 5, in the position shown by dotted lines. The chuck O hasa central coreD attached to the head-stock of the lathe, and the sectorsE are rabbeted about the core D, so that their peripheries form apractically unbroken surface. W'ith a core of this construction it willbe evident that the same can be withdrawn after the article shall havebeen spun. The bottom of the shell A', on account 7 5 of its firstspinning, conforms to the end of the sectional chuck O, and it is heldfirmly thereto by bringing up against it the tailpiece F, which isprovided with the tip G, arranged to turn upon the tail-stook of thelathe. The shell A' is thus held solidly upon the seotional chuck O, butallowed to turn freely with it. The shell A' upon the sectional chuck isnext spun into the shape shown in solid lines in Fig. 5, the metal beingworked from the edge toward the bottom, or from V to W`, as indicated bythe arrow. This is the opposite direction from that in which spinning`is usually done, and causes the shell to conform to the die from V to W,while the metal from XV to X protrudes beyond the chuck, as shown, inthe form of a hollow bulge, as at I-I. Finally, without removing thearticle from the chuck the metal from V'to X, forming the bulge, is spundown onto the chuck, as shown in Fig. 6, the metal being worked fromboth sides or ends toward the center, as indicatedmby the arrows. Themetal by the operation described is thickened and compacted between VVand X, as Ioo at K, and the thiekest and hardest part of greaterthiokness than the other spun porthe Walls of the article are at itsmost Vultion of its wall. 1 nerable point, and an article capable of re-In witness whereof I have hereunto set my sisting a sharp blow or impactis obtained by hand. 5 the use of the least quantity of metal. WILLIAMMCAUSLAND.

I claim- Witnesses: A holloW-spun Vessel having its Wall at its BENJ. B.PIERCE,

exposed points spun in opposite directions to L. A. I-IODGEs.

